#include <53func.h>
union test_u {
    int i;
    char c;
};
int main(int argc, char *argv[])
{
    //int i = 0x12345678;
    //char * p = (char *)&i;
    //printf("*p = %x\n", *p);
    union test_u a;
    a.i = 0x12345678;
    printf("a.c = %x\n", a.c);
    return 0;
}

